I am 19 years old with 3 swollen nodes on my neck. They are all easily moveable, painless, and have never changed in size. None are wider than my pinky finger, with the smallest one the size of a BB. I have perfect health and never felt better.

Lymph nodes such as you are describing you have are incredibly unlikely to be due to lymphoma. Your lymph nodes fit the classic description of what are termed shotty lymph nodes. They are small, mobile and unchanging. Most likely, they became enlarged while fighting a virus and did not quite shrink back down fully. This is quite common.

Lymph nodes that are cancerous are classically described as hard, immobile and changing (enlarging). Symptoms of lymphoma can vary dramatically in terms of timing. Some lymphomas are quite aggressive and can produce symptoms quickly, others are very indolent and can take months to develop.

I have the EXACT same thing. 3 small lymph nodes in my neck for 1.3 years and they do not change in size, texture or anything. I have no other symptoms and I feel great. Your question and doc answer gave me some reassurance.
Thank you!